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Volcanological Survey of Indonesia CC BY-SA 4.0 Wikimedia Commons

Iliwerung

Volcano

A volcano on Lembata Island in East Nusa Tenggara; visited by hikers and those interested in volcanic landscapes and island geology.

Iliwerung Gili IslandsSenggigiMount RinjaniMount TamboraLakey BeachKomodoLabuan BajoBajawaKelimutuMaumereSumbaKupangAlorIliwerung
In this guide

Iliwerung essentials

Address: Iliwerung Volcano area, Lembata Island, East Nusa Tenggara, Indonesia
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When to Go

Best Time to Visit Iliwerung

The dry season (May-September) is best for visiting volcanic areas for clearer skies and safer trail conditions.

Dry season
May-Sep · 22-30°C
Easier access and clearer views; best time for treks and coastal approaches.
Wet season
Oct-Apr · 24-32°C
Higher chance of ash and poor visibility; trails become muddy and guides may restrict access.

Weather & Climate near Iliwerung

Climate

Iliwerung's climate is classified as Tropical Savanna - Tropical Savanna climate with consistently warm temperatures year-round. Temperatures range from 20°C to 30°C. Abundant rainfall (1368 mm/year), wettest in January with a pronounced dry season.

Air Quality: AQI 42 Good
Best Time to Visit
AugustSeptemberJuly
Temperature & Rainfall
Temperature Range
33°
Warmest Month
23°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Good 22° - 28° 25° 287 mm overcast 81% 3.2 m/s 2.6 extreme 12.4h
February Good 22° - 28° 25° 253 mm overcast 82% 2.9 m/s 2.7 extreme 12.3h
March Very Good 22° - 29° 25° 212 mm partly cloudy 80% 2.1 m/s 2.7 extreme 12.0h
April Excellent 22° - 29° 25° 111 mm some cloud 76% 1.7 m/s 2.5 extreme 11.8h
May Excellent 21° - 29° 25° 53 mm mostly sunny 74% 2.6 m/s 2.1 extreme 11.6h
June Ideal 20° - 29° 25° 30 mm mostly sunny 72% 4.0 m/s 1.9 very high 11.5h
July Ideal 20° - 28° 24° 18 mm mostly sunny 70% 4.2 m/s 2.0 very high 11.6h
August Ideal 20° - 28° 24° 7 mm clear 67% 3.7 m/s 2.4 extreme 11.7h
September Ideal 20° - 29° 24° 8 mm clear 68% 3.7 m/s 2.7 extreme 11.9h
October Ideal 21° - 30° 26° 37 mm mostly sunny 69% 2.6 m/s 2.8 extreme 12.2h
November Very Good 23° - 30° 26° 125 mm some cloud 71% 2.3 m/s 2.8 extreme 12.4h
December Good 22° - 29° 26° 227 mm overcast 77% 2.2 m/s 2.5 extreme 12.5h
Getting There & Around

How to Get to Iliwerung

Lembata (and access to Iliwerung) is reached by ferry or small plane from Kupang (on Timor) or from Flores; local operators and village guides arrange overland approaches. Sea conditions and local regulations determine access; coordinate with local tourism offices or guides for the safest route.

Tips for Visiting Iliwerung

  • If attempting an ascent, hire a local guide familiar with the island's volcanic hazards and recent activity.
  • Bring a respirator or mask for sulfur-rich areas; volcanic vents can emit hazardous gases even when activity seems low.
  • Check maritime and aviation notices-active volcanoes may affect local transport and access.